Sichuan Water Conservancy's first shield to wear the river tunnel -Maoer Minjiang Dian Tunnel Pore

Chuanguan News reporter Shao Mingliang

On June 17, the reporter learned from the Sichuan Provincial Department of Water Conservancy that the Cat Minjiang Deni Tunnel was officially opened today to the first phase of the first phase of the north of the Jiaba irrigation district.

The Mao'er Minjiang River Tunnel is 1352 meters in length and wears the bottom of the Minjiang River at 400 meters. It was excavated on September 29 last year. This is the first time in the history of water conservancy construction in our province to cross the river and river, and it is also the largest diameter shield machine adopted by the water conservancy industry in the country.

The Tunnel of the Mao'er Minjiang River is officially connected. (Photo Conferring in Sichuan Water Conservancy Development Group Co., Ltd.)

It is understood that the whole machine weighs more than 1,300 tons, the length of the whole machine is 135 meters, and the excavation diameter is 9.2 meters. At the beginning of the construction, it used nearly 60 heavy trucks to take the 1,300 tons of "big guys". Shipping from Changsha to Yibin.

The Minjiang section of the Mao'er Minjiang River Tunnel is an important waters in the rare and unique fish national nature reserve in the upper reaches of the Yangtze River. The construction difficulty and safety risk are large. The relevant person in charge of the construction and development limited liability company of Sichuan Province Xiangjiaba irrigation district introduced that in order to ensure the smooth and orderly progress of construction and protect the ecological environment of the Yangtze River, the company has repeatedly discussed with experts of the Chinese Academy of Sciences after deciding to abandon the common drilling method. Use more advanced shield machine construction.

Relevant person in charge of the construction and development limited liability company of Xiangjiaba irrigation district in Sichuan Province said that the smooth penetration of the Maoer Minjiang Dian Dian Tunnel has important reference significance for the construction of the Da Cong Diandou Tunnel in our province. The one -step project of the period has laid a solid foundation.

【Project Business Card】

The Xiangjiaba Irrigation District Project is a supporting project determined by the comprehensive development and utilization task of the Jiaba Hydropower Station. It is an important part of the province's "five horizontal and six vertical" water diversion and hydration ecological water network projects. It is also one of the 172 key water conservancy projects in the country. In 2021, it was included in the National "Fourteenth Five -Year Plan" and the outline of the long -view target in 2035, and the "Outline of the Construction Planning of the Shuangcheng Economic Circle in Chengdu -Chongqing District".

Xiangjiaba irrigation district project covers 22 districts (counties) in 5 cities in Yibin City, Zigong City, Neijiang City, Luzhou City and Zhaotong City, Sichuan Province. mu. The entire project is planned for 15 years, and it is implemented in three phases, namely the first phase of the Beibei Grand Canal, the second phase of the Beibei Grand Canal, and the South President Ganchang. Among them, the first phase of the project is divided into one step, one step, two steps and two steps. At present, the first phase of the first phase of the north of the Xiangba Irrigation District is construction.

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